Process of making waterproof portland cement and product.



.- UUIVII vol I lunu,

COATING OR PLASTIC.

UNITED STATES PATENT OFFICE.

MAXIMILIAN TOCH, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO HENRY M.'IOCH, OF NEW YORK, N. Y.

PROCESS OF MAKING WATERPROOF No Drawing. Application filed April 1,

'1 all whom it may concern:

Be it known that I, MAXIMILIAN TooH, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Processes of Making\Vaterproof Portland Cement and Producmidh the following is aspecification.

According to the present invention, Portland cement is renderedwaterproof by incorporating with it, either during its manufacture or inits commerc1al form, a lVCQI'ld of a fatty acid and a metallic oxid orcompound capable of comblning with glycerin.

The glycerid is thereupon saponified by lime in the cement mixture, withthe producc'ion of a water-insoluble fatty-acid salt 01' salts ofcalcium, and glycerin, and the glycerin is then combined with themetallic base to form an insoluble glycerid of the metal. I In carryingout the invention, the 1 c- I erid, e. (7.. stearin. or mutton or beefTal- }l ?l 1C 9l11l2 l J1. -9- 1 ar 'efare eitbcimdddlinnnd round witi 1lhe cement. clinker or are intim m'l Portland ment. Ihe mixture is preera) y ma 0 an 1e lime in the mixture reacts Wl'l 1e stearin or otherfat with the production of calcium stearate or other fatty-acid salt orsalts, while the freed glycerin combines with the lithargc to form leadglycerid, insoluble in salt water. It is sufiicient to add the fat insuch amount as to produce from one to two per cent. of the calciumfatty-acid compound in the finished product, the amount of lithargesimultaneously added being cal- 40 culated on the basis of the glycerincontained in the fat.

Instead of effecting the saponification of the added fat by the galciumcompounds 3 present: in the cement, uicklime 'nay b e 4d gilded to theclinker o1 cemen amount suflicient to par'ia y or W10 y satisfy thefatty acids. A small amount of na hthale g., three per cent, may als obe added Specification of Letters Patent.

PORTLAND CEMENT AND PRODUCT.

Patented Nov. 22, 1910. 1910. Serial No. 552,876.

I am aware that it is old to waterproof Portland cement by addingthereto preformed stearate of lime free from glycerin, this being thesubject-matter of U. S. Letters Patent No. 851,247, granted April 23,1907, to Spencer B. Newberry. The pres-v ent lllYelitlOll is distinctfrom thedNewberry process, iowever, in that fats an not free fatty-acidsare emp oyed, and in cm components of the fat are utilized, upon its 6saponification, to produce waterproofing compounds. J

I claim:

1. The process of making waterproof Portland cement, which consists inmixing with the cement a fat and a, metallic compound the base of whichwill combine with glycerin, saponifying the fat by a calcium compound inthe mixture, and binding the liberated glycerin as a metallic glycerid.

2. The process of making waterproof Portland cement, which consists inmixing with the cement a fat and lead oxid, reacting on the fat withproduction of a calcium fatty-acid-salt and glycerin, and binding theglycerin as lead 'lycerid.

3. The process 0% making waterproof Portland cement, which consists inmixing with the cement a fat, lead oxid and naphthalene, reacting on thefat with production of a calcium fatty-acid salt and glycerin, andbinding the glycerin as lead glycerid.

4. Vater-proot Portland cement having admixed therewith a calciumfatty-acid salt and a metallic glycerid.

5. \Vater-proof Portland cement having admixed therewith a calciumfatty-acid salt and lead glycerid.

6. ater-proof Portland cement having admixed therewith a calciumfatty-acid salt, lead glycerid and naphthalene.

In testimony whereof, I atfix my signature in presence of two witnesses.

MAXIMILIAN TOCH.

Witnesses ARGHIBALD C. REID,

0 tie cement to increase its water-shedding 50 properties.

RoB'r. M. WHITESELL.

